Skeletons of early vertebrates were composed of cartilage instead of bone. which characteristic does cartilage share with notochords? a. it is hard and rigid. b. it is soft and flexible. c. it contracts. d. oxygen can diffuse through it

Asegment id dna that is artificially created from two or more organism through use of dna enzymes in a laboratory is called a segment of dna that is artificially created from two or more organisms through use of dna enzymes in a laboratory is called

The diffrences between complement system and interfernon

Attached earlobes are a reccesive trait in humans. in the tree below, people with attached earlobes are shaded in. which best describes labeled x in the tree? a: a female with one recessive allele b: a female with no recessive allelesc: a male with no recessive allelesd: a male with one recessive allele